iOS 13.3 (build 17C5046a) is an official Apple over-the-air update for the iPhone XS, released on 2019-11-20T18:04:18Z. The update package is 856.78 MB. This is a delta (partial) update that requires 13.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8fe485e33e44e3d40f07abf404b839e77d37bbda.zip.